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/*
* Unix SMB/CIFS implementation.
* Virtual Windows Registry Layer
* Copyright (C) Gerald Carter 2002.
* Copyright (C) Michael Adam 2008
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/* Implementation of registry hook cache tree */
#include "includes.h"
#include "adt_tree.h"
#include "registry.h"
#include "reg_cachehook.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_REGISTRY
static struct sorted_tree *cache_tree = NULL;
extern struct registry_ops regdb_ops; /* these are the default */
static WERROR keyname_to_path(TALLOC_CTX *mem_ctx, const char *keyname,
char **path)
{
char *tmp_path = NULL;
if ((keyname == NULL) || (path == NULL)) {
return WERR_INVALID_PARAMETER;
}
tmp_path = talloc_asprintf(mem_ctx, "\\%s", keyname);
if (tmp_path == NULL) {
DEBUG(0, ("talloc_asprintf failed!\n"));
return WERR_NOT_ENOUGH_MEMORY;
}
*path = tmp_path;
return WERR_OK;
}
/**********************************************************************
Initialize the cache tree if it has not been initialized yet.
*********************************************************************/
WERROR reghook_cache_init(void)
{
if (cache_tree != NULL) {
return WERR_OK;
}
cache_tree = pathtree_init(®db_ops);
if (cache_tree == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
DEBUG(10, ("reghook_cache_init: new tree with default "
"ops %p for key [%s]\n", (void *)®db_ops,
KEY_TREE_ROOT));
return WERR_OK;
}
/**********************************************************************
Add a new registry hook to the cache. Note that the keyname
is not in the exact format that a struct sorted_tree expects.
*********************************************************************/
WERROR reghook_cache_add(const char *keyname, struct registry_ops *ops)
{
WERROR werr;
char *key = NULL;
if ((keyname == NULL) || (ops == NULL)) {
return WERR_INVALID_PARAMETER;
}
werr = keyname_to_path(talloc_tos(), keyname, &key);
if (!W_ERROR_IS_OK(werr)) {
goto done;
}
DEBUG(10, ("reghook_cache_add: Adding ops %p for key [%s]\n",
(void *)ops, key));
if (!pathtree_add(cache_tree, key, ops))
werr = WERR_NOT_ENOUGH_MEMORY;
else
werr = WERR_OK;
done:
TALLOC_FREE(key);
return werr;
}
/**********************************************************************
Find a key in the cache.
*********************************************************************/
struct registry_ops *reghook_cache_find(const char *keyname)
{
WERROR werr;
char *key = NULL;
struct registry_ops *ops = NULL;
if (keyname == NULL) {
return NULL;
}
werr = keyname_to_path(talloc_tos(), keyname, &key);
if (!W_ERROR_IS_OK(werr)) {
goto done;
}
DEBUG(10,("reghook_cache_find: Searching for keyname [%s]\n", key));
ops = (struct registry_ops *)pathtree_find(cache_tree, key);
DEBUG(10, ("reghook_cache_find: found ops %p for key [%s]\n",
ops ? (void *)ops : 0, key));
done:
TALLOC_FREE(key);
return ops;
}
/**********************************************************************
Print out the cache tree structure for debugging.
*********************************************************************/
void reghook_dump_cache( int debuglevel )
{
DEBUG(debuglevel,("reghook_dump_cache: Starting cache dump now...\n"));
pathtree_print_keys( cache_tree, debuglevel );
}
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